Gboege cbompton and hobace wyman



(NoModel.)

G. GROMPTON 8u H. WYMAN.

` MECHANICAL MOVEMENT. No. 336,625. Izatented Feb. 23, 1886.

N, PETERS. Phawuthogmpher. whingmn. D. C.

y UNITED STATES PATENT EEICE.

GEORGE CROMPTON AND HORACE VYMAN, OF WORCEST EE, MASSACHUSETTS,

` ASSIGNORS TO SAID CROMPTON.

MECHANICAL MOVEMENT.

:SPECIFICATION forming part of Letters Patent No. 336,625, datedFebruary 23, 1856.

Application filed September 11, 1885. Serial No. 176,557. (No model.)

T all wh-0m t may concern:

Be it known that we, GEORGE CnorrrToN and HORACE W'YMAN,both ofthe cityand cou n ty of Worcester, State of l\Iassacl1usetts,have

invented an Improvementin Mechanical llIove-\ ments, of which thefollowing description, in

' connection with the accompanying drawings, is a speciication, likeletters on the drawings representing like parts.

1o This invention has for its object the production of a novel andsimple mechanism whereby a bar or rod may be reciprocated for differentdistances in one or the other direction, and be left at rest in eitherone of several defined r 5 positions, the time occupied in the movementof the rod being the same, whether it is made to pass from one to itsnext position or from its extreme positions.

In another application, Serial No.176,856,

2o filed concurrently herewith, we have shown a main lever mounted on anauxiliary lever, the fulcrum of thelatter being made movableindenpendently, so that the free end of the auxiliary lever might have fourrather than two posi- 2 5 tions, as heretofore, thus enabling the rod orbar to occupy six or more positions, as would not be the case if thefulcrum of the main lever were not movable. f

In this present invention, instead of supporting the lever,whichisjoined by cord or chain with the bar or rod to be moved over differentdistances, as described, the said lever has its fulcrum on a radinsbar,the said bar next the fulcrum of the said lever, which we shall call themain lever, being joined with a link which is attached to the end of asecondary lever having its fulcrum on a radius-bar, and herein we haveshown a second link attached to the said radius-bar at the fulcrum ofthe second 4o lever, the said second link being attached to a thirdlever. The main and the second and third levers referred to are eachjoined by a connecting-rod to a crank capable of being moved in one andthen in the opposite direction for a little more than a semi-rotation,and

there remain at rest.

Ourinventionconsists in a mechanical movement, including a main lever, aradius-bar to support the fulcrum of the said main lever, a

5o second lever, a link to connect it with the fulcrum of the mainlever, and a radius-bar to support the fulcrum of the second lever,combined with two cranks and connecting-rods by which to move the saidlevers, the movement ofthe second lever moving the fulcrum ofthe mainlever and the radius-bar supporting it,

as will be described.

Figure l in elevation represents devices combined to produce ourimproved mechanical movement, the upper end ofthe rod or barbe- 6o ingbroken off to save space on the drawings; Fig. 2, atop view thereof; andFig. 3 a diagram to be referred to, the said gnre showing the entire rodor bar which is to be moved by the levers or devices fully shown inFigs. l and 2 6 and represented by linesin Fig. 3.

In the drawings, the board A, supposed to be part of a machine orframing, has guides A', to guide the rod or bar A?, which is to bemoved, as will be. described, overa distance indicated 7c by one or moreof its spaces, 1 2 3 4 5 6 7 8, the said rod or bar by the devices to bedescribed being capable of being left with any one of its spaces in whatwe will call working position,17 opposite the working-line o.

The cord or chain A3 (herein shown as the means for joining the rod orbar with the main lever c) is extended over the pulley At; but insteadofthe said cord or chain any other snitable but common or usual mode ofconnecting 8o a lever and rod may be used. The main lever a has itsfulcrum a at thelower end of a radiusbar, a2, pivoted at a?. The link bat one end is joined to the fulcrum a of the lever a, and by pivot-pin bto the lower end of the second lever, b2, having its fulcrum b3 on aradins-bar, b, pivoted at b5.

As herein described, to increase the range of movement of the rod or barA2, we have connected the upper end of the radius-bar b* and 9o fulcrumof the secondlever, bwith a third lever, c, bya secondlink, c', movementof which lever on its fulcrum c2 effects the movement of the fnlcrum ofthe second lever, b2. The upper ends of the levers (0,112, and c arejoined, respectively, by connecting-rods d d d2, in turn connected,respectively, with the cords e e e2,

(shown herein as mounted loosely on the same stud f but in practice eachof the said cranks will be toothed at its periphery, will have its rocfulcrum on a vibrator, movement of which at theproper times will placethe teeth of the crank in engagement with one or the other of twopartial gears, all as shown in United States Patent No. 281,842, datedJuly 24, 1883, to which reference may be had.

As a modification, the levers b2 and c and the links b and c may beomitted, and instead We may use two disks or pulleys, (shown by thedotted circles 8 9 described from the centers of the said levers,) andin such event the connecting-rod d2 will have attached to it a cord,(shown by the dotted line 12,) it being passed about the disk 9 andattached to the radiusbar b4, the connecting-rod@ having attached to ita cord, 1.3,Which is extended about the disk or pulley 9, and attachedto the radius-bar a? or lever a near the fulorum a.

Ve claim- 1. The main lever a and the radius-bar to support the pivotfor the said main lever, link b, the second lever,and the radius-bar tohold lthe pivot or fulcrum for the second lever, combined with thetwoconnecting-rodsjoined with the main and second levers, and with means,substantially as described, to move the said connecting-rods, as setforth.

2. The main lever et and the radiusbar to support the pivot for the saidmain lever, link b, the second lever, and the radiusbar to hold thepivot or fulcruni for the said second lever, and the third lever orlinkbetween it and the radius-bar carrying the pivot for the second lever,combined with the three connecting-rods joined to the main lever and tothe second and third levers, and with means, substantially as described,toA operate the said connecting-rods, as set forth.

In testimony whereof we have signed our names to this specilication inthe presence of two subscribing Witnesses.

GEO. GROMPTON. HORACE VYMAN. Wi tn esses HENRY E. HILL, J oHN B. SYME.

